Code No. B -16 Hall Ticket No.
University ofHyderabad ENTRANCE EXAMINATION 2013-2014
M. Sc in Ocean Atmospheric Sciences
Date/Day: 25.02.2013, Monday 1. 0.00 .. 12.00 Marks:75

Instructions for the candidates:
1.
All questions carry equal marks.

2.
Write your Hall Ticket Number on the OMR Answer Sheet and in the space provided on the question paper.

3.
The question paper consists of Objective Type questions of one mark each. For each question, there are four answers and the answers are to be indicated with capital letters ofalphabets viz., C and D.

4.
The question paper consists ofPart A and Part B.

5.
Answers are to be marked on the OMR answer sheet following the instructions provided there upon.

6.
Hand over .. the OMR answer sheet at the end ofthe examination.

7.
No additional sheets will be provided. Rough work can be done in the space provided at the end ofthe booklet.

8.
Non-programmable calculators are allowed.


PART
1.
The radius ofthe hydrogen atom in its ground state is 0.53 A. After collision with an electron its radius is found to be unchanged. Its principal quantum number is 0 2 where n is any positive integer.

2.
Dark lines observable in the solar spectrum are caused by the


scattering of light.


absence of some elements in the Sun.


absorption ofcertain wavelengths by elements present in the Earth's atmosphere.


absorptionofcertainwavelengthsbyelementspresentintheouterlayer ofthe Sun.



3.
If the energy released in one nuclear reaction is 100 MeV, for a 320 kW power plant, the number ofnuclei required per second is X 1016 1016 6.023 X 1023 1016

4.
The resistance ofan electrolyte solution in a burette is 1 n. Ifthe same solution is poured into another tube ofhalf the diameter, what will be its resistance? n 0.5 n 16 n 0.0625 n

5.
If the Earth's gravity were to become half its value, then an object on the surface would lose


Both weight and mass mass, but not weight.


weight, but not mass. neither weight nor mass.






6. The shape of the Earth is
Spherical prolate spheroidal oblate spheroidal elliptical
7. The oceans cover about of the surface area of the Earth. The value ofx2 is
49% 70% 4900 0.77
8.
The average depth of the oceans is (A)6370 kIn 4000 kIn 100 kIn 4 kIn

9.
The salt content ofthe oceans is about mg/kg 1 g/kg 35 kg/kg 35 g/kg

10.
The ocean which has the largest area is the (A)Atlantic Pacific Indian Arctic

11.
Salt which is the most abundant in the ocean is (A)KCI NaCI CaC03 MgC03

12.
The speed of sound on the sea is x times that in air. The value ofx is 0 (C)0.5

13.
Tsunami never occurs in the (A)Coastal area islands deep ocean continental margins

14.
The restoring force for the large ocean waves that you see in a beach is (A)Gravity buoyancy viscosity surface tension

15.
The International Date line falls in the (A)Pacific Ocean Atlantic Ocean Indian Ocean Mediterranean

16.
When a metal sphere is heated, the percentage increase is minimum for its (A)Diameter volume area density

17.
Viscosity of a fluid is defined as



Force per unit length on its surface Force per unit area on its surface


Internal friction per unit area force per unit area per unit velocity gradient


18.
A capillary tube partially immersed in a liquid shows a capillary rise of 0.707 cm. Ifthe same capillary is immerse at an angle of what will be the capillary rise? cm 1 cm 2 cm 1.414 cm

19.
Two gases ofthe same pressure, volume and temperature are mixed. Ifthe volume and temperature ofthe mixture is the same as the previous temperature and volume ofeach of the gases, what will be the pressure ofthe mixture?



Same as the original pressure


Twice the original pressure


Thrice the original pressure


Half the original pressure


20. For producing beats, two sources ofsound should have the (A)same amplitude (B)same frequency
widely different amplitudes closely differing frequencies
21.
The equation of a stretched string is: y 1.0 sin where x is in cm and t is in sec. The wavelength ofthe wave is (A)100 cm 1 cm 0.01 cm 10 cm

22.
Weather phenomena happen in this layer ofthe atmosphere: (A)Stratosphere exosphere troposphere tropopause

23.
Assuming that the atmospheric pressure is equivalent to 10 m ofwater column, an air bubble of volume Icc rising from 90 m depth ofwater would have a volume ofx cc at the surface before breaking. The value ofx is: 0.1 9 cc


24.Ifacyclewheel of4m completesonerevolution in2seconds,theacceleration ofthe cycle is (A)81t2 (C)1t2 41t2
25. The escape velocity from the Earth Is directly proportional to the mass ofthe rocket

Is directly proportional to the square ofthe mass ofthe rocket


Isinverselyproportionaltothesquareroot ofthe mass oftheEarth
Is directly proportional to the square root ofthe mass ofthe Earth



PART-B
26. Which ofthe following bonds has the highest bond enthalpy? C=O C=N N=N


B-Ib

27.
Ifthe first order reaction rate constant is 0.693 the half-life ofthe reaction is
hr 693 hr 0.693 hr 0.1 hr


28.
Silver chloride dissolves in excess ofNH40H. The cation present in this solution is [Ag(NH3)4t [Ag(NH2hl [Ag(NH3)6l

29.
Which ofthe following has the lowest metallic conductivity?
(A)Silver sodium copper zinc


30.
Which ofthe following is unaffected by temperature variation?
(A)Molarity normality molality formality


31.
The inert form of carbon is
(A)Coal diamond graphite charcoal


32.
Bleaching action of S02 is due to its (A)Oxidizing action acidic nature hydrolyzing ability reducing action

33.
The effect of repulsion between two lone pairs of electrons present in the oxygen ofa water molecule is (A)Change in the bond angle decrease in the bond angle


increase in the bond angle all atoms will be in one plane
34. Gases exhibit ideal behavior at

low pressures And low temperatures high temperatures and high pressures


high temperatures and low pressures low temperatures and high pressures


35. An isotope ofhydrogen has two neutrons and a proton. Its atomic and mass numbers are, respectively,
1,2 1,3 2,1 2,3
36. Of a number, 30% of 60% of40% is a gross. What is 25% ofthe amount?
2000 500 144 274
37. In a class the average age of40 students is 20 years. The average age of25 girls in the class is 19.6 years. What is the average age ofthe boys in the class?
19% 21% 20%
38.
25Y3 25Xi 24Ys
39. What will be the area ofa semicircle having a perimeter ofa cm2?
1ui/(2+ni nd/(4+21ti
40. B is the brother ofC, who is the daughter ofD. F is the husband ofD. How is B related to
son father cousin nephew
41. Govind was doing yoga on one morning in a ground. His mother was coming from the opposite direction, and her shadow was falling exactly behind him. Which direction was Govind facing?
west east north-east south-east
42.
Find the missing number

16,81,256, 1296,...
(A)625 512 1024 776


43.
Find the missing number y in the following sequence: 1000, 1475, 1950,y, 2900, ... (A)2325 2500 2275 2425

44.
60 cows eat 280 kg ofhay in 14 days. In how many days will 30 cows eat 120 kg ofhay?

12 days 9 days 7 days days

45.
Maldives are located in the

Indian Ocean Arabian Sea Southern Ocean South China Sea

46.
23% of 8040 42% of 545 of 3000? Evaluate x.

56.17 63.04 71.04 69.27

47.
Which forms a new compound in air?

N2 in air 02 in air phosphorus in air

48.
The ratio of specific heats y for inert gases is


1.33 1.66 2.13 1.99


49. Which ofthe following has the highest pH value in water?
NaHC03 NaCI KCI

50. Osmotic pressure in a tree can be increased by

increasing volume increasing temperature


decreasing temperature increasing rainfall


51. Whatisthe entropy change(inJ K·lmorl)when 1mole oficeisconverted to waterat O°C,if l
the enthalpy change is 6 kJ mor at
20.13 2.013 2.198 21.98
52. Ify is the ratio ofspecific heats ofa perfect gas, the number ofdegrees offreedom ofa molecule ofthe gas is

53. Ifx sin +RWf andy cos (where m and R are constants), what are the x andy components ofacceleration wheny is a minimum?
Rm2 Rm2, 0 -Rm2 -Rw2,0
54. Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position. After some time, the pressure
will increase remains the same will decrease may increase or decrease
55. Which ofthe following has no dimensions?
strain angular velocity momentum angular momentum
56. The maximum velocity and maximum acceleration ofa body executing simple harmonioc motion are respectively, 2 ms·1 and 4 ms·2. Its angular velocity is
1 radian S·I 2 radian S·I 3 radian S·I 4 radian S·I
57. IfR is the radius ofa planet and g its mean acceleration due to gravity, then, its mean density is given by (taking G as the Universal constant ofgravitation)
3gG/(4nR) 4ngR/(3G) 4nGR/(3g) 3g/(4nGR)
58. If a body falling freely from rest describes distances Sh S2 and S3, respectively, in the first, second and third seconds ofits fall, then the ratio SI:S2:S3 is
9

B-lb

59. A crown made ofgold and copper weighs 210 g in air and 198 g in water. The weight ofgold in the crown is, taking the densities of gold and copper, respectively, to be 19.3 and 8.5 g nearly
93g (B)100 g 150 g 193 g
60. For a floating object to be in stable equilibrium, its centre ofbuoyancy should be

vertically above its centre of gravity vertically below its centre of gravity


horizontally in line with the centre of gravity may be anywhere


61. Due to the rotation ofthe Earth, each 15° longitude on the Earth represents
one hour half an hour forty five minutes one hour fifteen minutes
62. If PALE is coded as 2134 and Earth as 41590, what should PEARL be coded as?
29530 24153 25413 25430
63. Ifall the 26 letters ofthe English alphabet are written in reverse order, deleting all the vowels, what would be the eighth letter from the right?
L J
64. Appu was born on 10th Oct 1970, while Nandi was born 35 days before Appu. Ifthe republic day fell on that year on a Tuesday, on which day Nandi was born?
Monday Tuesday Wednesday qSunday
65. After removing all prime numbers from the integers 1 to 19, how many integers would be left?
33 34 32 36
66. Raju started at point X and walked 5 km due west, then turned left and walked 10 km straight and again turned left and walked straight 7 km. In which direction is he now from point

North east south west South east north west
67. The length ofthe seconds pendulum is 1 m ofthe Earth. Ifthe mass and diameter ofa planet are double those ofthe Earth, the length ofthe seconds pendulum on this planet would be
1 m 0.5 m
68. A jet engine works on the principle ofconservation of
linear momentum mass energy angular momentum
B-lb

69. The Sun appears to be elliptical during sunrise or sunset because of
refraction refraction scattering dispersion
70. Ifpressure is constant, the rate of diffusion varies

directly to density inversely to density


inversely to square root ofdensity directly to square root ofdensity


71. Evaporation ofwater is an/a
exothermic change endothermic change isentropic change chemical change
72. What is the next number in the series: 40,29,20,
11
73. The box product ofthree position veCtors

is always zero represents the volume enclose by the three vectors


represents the total surface area ofthe solid enclosed by the three vectors


cannot be interpreted unless the vectors are known


74. Ifthe divergence ofa vector is zero, then

it has a scalar potential it has a vector potential


it has no potential in general


potential cannot be determined without explicit value ofthe vector.


75. The vector V is the gradient ofa scalar <p. The curl of V is
zero determinant of<p gradient of curl of<p